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I have a Chrysler 360 with an open water cooling system no heat exchanger. This is a different motor that came with the boat came with a 318 that was under powered so went to the next size up. But this motor has a circulatory pump on the motor the other one did not how do I incorporate both freshwater pump in this circulatory pub together to pump to the Block. In which direction does the water flow
Are you asking how the engine's coolant circulating pump and the seawater pump work together?
Post back reqarding the actual type of cooling system that your engine is equipped with.
Scott's system is what we refer to as a "Full System". (Full System includes the exhaust manifolds in with the E/G coolant)
A "Half System" would use the E/G coolant for the cylinder block and cylinder heads only.